limit dl to 1 per hour

app/site_files.rb

@@ -189,9 +189,17 @@ end
 get '/site_files/:username.zip' do |username|
   require_login
 
+  if !current_site.dl_queued_at.nil? && current_site.dl_queued_at > 1.hour.ago
+    flash[:error] = 'Site downloads are currently limited to once per hour, please try again later.'
+    redirect request.referer
+  end
+
   content_type 'application/zip'
   attachment   "neocities-#{current_site.username}.zip"
 
+  current_site.dl_queued_at = Time.now
+  current_site.save_changes validate: false
+
   directory_path = current_site.files_path
 
   stream do |out|

migrations/118_site_dl_queued_at.rb

@@ -0,0 +1,9 @@
+Sequel.migration do
+  up {
+    DB.add_column :sites, :dl_queued_at, Time
+  }
+
+  down {
+    DB.drop_column :sites, :dl_queued_at
+  }
+end